I built the UI for the Dashboard feature in Iterable. The Dashboard lets you monitor the performance of all your Iterable campaigns with drag-and-drop data visualization widgets.
Using a simple drag and drop library, I created the Dashboard framework to support the ability for customers to create custom dashboard to monitor their performance. The original idea was to have a set of dashboard with predifined widgets but it wouldn't apply to everyone's use cases.
The dashboard is built on an 8 column grid and each widget can be between two to eight columns wide and placed anywhere on the grid where possible.